Overview
The TLP251 is a high-speed photocoupler manufactured by Toshiba, designed for applications requiring electrical isolation and noise immunity. It consists of a GaAs infrared LED coupled with a photodetector in a compact DIP-6 package. This optocoupler is widely used in industrial automation, power electronics, and communication systems where signal integrity must be maintained across different voltage domains. Its 3750Vrms isolation voltage makes it suitable for high-voltage environments.
Structure and Working Principle
The TLP251 integrates an LED and a photodetector in a single package. When the input LED is energized, it emits infrared light, which activates the photodetector, creating an isolated output signal. The device operates at speeds up to 1MBd, making it suitable for digital signal isolation. The internal design ensures minimal crosstalk and high common-mode transient immunity, critical for noisy industrial environments.
Key Features
Key features include a high isolation voltage of 3750Vrms, compact DIP-6 package, and a wide operating temperature range (-55°C to +110°C). The TLP251 also offers low power consumption and high reliability. Its high-speed response (typically 3μs propagation delay) makes it ideal for applications requiring fast signal transmission while maintaining electrical isolation between circuits.
Application Areas
The TLP251 is commonly used in industrial control systems, programmable logic controllers (PLCs), and inverter circuits. It provides isolation in motor drives, power supplies, and communication interfaces. In renewable energy systems, it isolates control signals in solar inverters and wind turbine converters. The device is also found in medical equipment where electrical isolation is critical for patient safety.
Maintenance and Precautions
Proper handling is essential to maintain the TLP251's performance. Avoid static discharge during installation and ensure the input current does not exceed the specified maximum (typically 50mA). For long-term reliability, operate within the recommended temperature and voltage ranges. Proper PCB layout with adequate creepage distance is necessary to maintain the rated isolation voltage.
B2B Procurement Guide
When procuring TLP251 in bulk, verify manufacturer authenticity to avoid counterfeit components. Consider lead time and MOQ (Minimum Order Quantity) from authorized distributors. For cost-sensitive applications, compare pricing from multiple suppliers while ensuring compliance with required specifications. Some suppliers offer tape-and-reel packaging for automated assembly processes.
Related Manufacturers
- 主营：圣邦微芯片、TI芯片、顺芯芯片、晶丰明源芯片、GD芯片、中科微芯片、微源芯片、普冉电子、上海贝岭
- 主营：集成电路IC、二三极管、电源管理芯片、存储IC、运放IC、单片、芯片、电容电阻、电源开关、传感器、连接器、MOS 场效应管、IGBT模块、继电器、GPS定位模块、电源模块、微控制器、接口芯片、数字信号处理器、晶体管
- 主营：氧化铝陶瓷片
- 主营：单片机、fh3055gs6、fh4606g6d、g3506504d、g3506504c、g3506504h、fh3050gs6、g3506510r、fh1904gs2、g3506510l、fh3404tl4、g3506510g、g3506502h、g3506502r、变压器、uja1169tk、fh8810bt6、tle42794g、fh30120gs、计时器、fh32p03g6、g3506008j、sfi4405at、g35060101、fh3504tl4
- 主营：接口IC、存储IC、XILINX/赛灵思、ADI/亚德诺、ST/意法
- 主营：光耦继电器
- 主营：接插件、转换器、芯片、二极管
- 主营：海思芯片、安防监控摄像头芯片、单片机、微控制器、集成电路、稳压芯片、转换器芯片、测温传感器、连接器、模块、内存芯片
- 主营：74lvt374d、max917euk、hz3c2do35、74hc4067d、uln2003ap、hin232cbz、max485cpa、fds6961az、adg801brt、74abt541d、mpc89e52ap、tpa751dgnr、phkd6n02lt、upd63200gs、a7800a7841、74abt240db、max2641eut、sn74ls245n、lm5642xmax、max4477asa、nc7st08m5x、sn74ls26dr、sn74ls33dr、a3410a7840、max3241eca
- 主营：g950t63uf、hfa15pb60、bd9965nuv、s1117-25q、irf7313tr、rfu10tf6s、ba10324af、mt6611v/b、mo2042-4d、wg82579lm、cs8900-cq、tea1755lt、rt8106gqw、ap80t10gp、dss7700su、oz9910ign、dta144wka、ice3b1565、apm4431kc、bd9132muv、m3p55bst3、wm8746eds、rt9701pbl、tza3044tt、封装bga
- 主营：el5375iuz、cd4069ube、l6599adtr、fqpf5n60c、adxl203ce、编码器、lm324dr2g、sn74ls07n、microchip、imd2at108、st13003-k、触摸屏、mjd112t4g、放大器、ad2s83apz、idt接口、传感器、tps71025p、sn75453bp、bas21ht1g、icref43gs、discretes、x9313wsiz、adi音频、100mw6.8v
- 主营：mmbz5241b、pmbt2222a、xv-8000lk、tle7237sl、irf740pbf、lm324dr2g、ts321ailt、se5007t-r、mmsz5225b、iw3602-01、njm2374am、sy8823quc、svf10n65f、svf10n65t、lm2902pwr、lmv324idr、mxc6225xc、tld5097el、nb681gd-z、hx1188nlt、irf840pbf、tfzvtr27b、pac5223qm、rt7231gcp、bsc0702ls
- 主营：晶闸管、svf20n60f、nce15h11t、nce40p06s、lmv604max、ob2263nmp、tc4469cpd、lp8765rle、ob3622nap、m451ve6ae、ob2223fap、nce1540ka、bl24sa64b、sy8823quc、opa2350ea、max489epd、max489epa、mb47393pf、nce1520ka、max988euk、lm2727mtx、m451vg6ae、mic5819yn、r6p72p4sl、rld65pzx2
- 主营：tlp251光电耦合器、集成电路芯片、特殊逻辑IC、模块 风扇 连接器 开关
- 主营：ad52068na、应美盛、pdz6.2bna、欧姆龙、lm324dr2g、锂电池、iccj431na、ee-sx1042、bq26501na、dm265mana、ad2s83apz、音频dsp、mt6260ana、lm301anna、tl3845pna、oc5808lna、ac6368bna、st1s10phr、至诚微、csr8635na、tp4056ena、赛芯微、fhx76lpna、stps2150a、外磁铁